Patents by Inventor Toshiyuki Sawa
Toshiyuki Sawa has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11593690Abstract: Provided is a data prediction system for predicting a future prediction value. The data prediction system has a data management device which manages data and a prediction operation device which models tendency of an error amount of a prediction operation result calculated on the basis of a correlation with a major explanatory variable and corrects a future prediction value. The data management device includes a storage unit which stores prediction target past measurement data observed with a time transition and explanatory factor data explaining the prediction target past measurement data.Type: GrantFiled: May 16, 2017Date of Patent: February 28, 2023Assignee: HITACHI, LTD.Inventors: Masato Utsumi, Tohru Watanabe, Ikuo Shigemori, Youko Sakikubo, Toshiyuki Sawa, Hiroshi Iimura, Hiroaki Ogawa, Yoshihisa Okamoto
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Patent number: 11342750Abstract: A power demand/supply adjustment power procurement plan support device supports a power system through a power transaction in the power market and has an added power transmission capacity analysis means and a target power transmittable capacity determination means. The added power transmission capacity analysis means obtains: actual power supply data including a power supply having supplied power to the power system and the actual value of a power supply amount; an actual power system stabilization data including a power supply performing power supply restriction for power system stabilization, an electric control amount or a customer facility performing a load restriction, and the actual value of a load control amount; and an actual power demand/supply adjustment power procurement data including a procurement amount of the power demand/supply adjustment power of a power supply participating in the power market and the actual value of the total procurement cost.Type: GrantFiled: October 11, 2017Date of Patent: May 24, 2022Assignee: HITACHI, LTD.Inventors: Toshiyuki Miyake, Kenichiro Yamane, Masahiro Yatsu, Taichiro Kawahara, Toshiyuki Sawa
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Publication number: 20190372348Abstract: A power demand/supply adjustment power procurement plan support device supports a power system through a power transaction in the power market and has an added power transmission capacity analysis means and a target power transmittable capacity determination means. The added power transmission capacity analysis means obtains: actual power supply data including a power supply having supplied power to the power system and the actual value of a power supply amount; an actual power system stabilization data including a power supply performing power supply restriction for power system stabilization, an electric control amount or a customer facility performing a load restriction, and the actual value of a load control amount; and an actual power demand/supply adjustment power procurement data including a procurement amount of the power demand/supply adjustment power of a power supply participating in the power market and the actual value of the total procurement cost.Type: ApplicationFiled: October 11, 2017Publication date: December 5, 2019Inventors: Toshiyuki MIYAKE, Kenichiro YAMANE, Masahiro YATSU, Taichiro KAWAHARA, Toshiyuki SAWA
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Publication number: 20190303783Abstract: Provided is a data prediction system for predicting a future prediction value. The data prediction system has a data management device which manages data and a prediction operation device which models tendency of an error amount of a prediction operation result calculated on the basis of a correlation with a major explanatory variable and corrects a future prediction value. The data management device includes a storage unit which stores prediction target past measurement data observed with a time transition and explanatory factor data explaining the prediction target past measurement data.Type: ApplicationFiled: May 16, 2017Publication date: October 3, 2019Applicant: HITACHI, LTD.Inventors: Masato UTSUMI, Tohru WATANABE, Ikuo SHIGEMORI, Youko SAKIKUBO, Toshiyuki SAWA, Hiroshi IIMURA, Hiroaki OGAWA, Yoshihisa OKAMOTO
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Publication number: 20190279239Abstract: The present invention is provided with: a player action prediction unit that predicts the action of a player and calculates a sales order information prediction value; a market physical restraint prediction unit that predicts the state of a power transfer path, which includes grid-connection line available capacity indicating excess transferred power between areas, and calculates a prediction value for the state of the power transport path; and a market prediction unit that predicts a market price on the basis of the sales order information prediction value and the prediction value for the power transfer path state.Type: ApplicationFiled: February 1, 2018Publication date: September 12, 2019Inventors: Yu IKEMOTO, Tohru WATANABE, Masato UTSUMI, Yoshihisa OKAMOTO, Ikuo SHIGEMORI, Youko SAKIKUBO, Toshiyuki SAWA, Nobuhiro GOTOUDA, Hiroshi IIMURA
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Patent number: 9852483Abstract: A plurality of forecast weather groups in a period comprising a plurality of days including a forecast target day for forecasting the electric power demand, and a plurality of actual weather groups in a period in a plurality of days in the past are set as the target period, and the similarity between the forecast weather group and the plurality of actual weather groups is calculated, a trend of a subsequent electric power demand is predicted based on the comparison of the plurality of calculated similarities whereby the electric power demand of a forecast target day is known.Type: GrantFiled: August 14, 2012Date of Patent: December 26, 2017Assignee: Hitachi, Ltd.Inventors: Toshiyuki Sawa, Shigeki Mori, Jun Yamazaki
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Patent number: 9843190Abstract: A power system management device which manages a system state in a power system includes a system state candidate calculation unit for calculating state amounts of the system state based on an objective function from system characteristic information indicating characteristic information of a system structure, an inter-state distance calculation unit for calculating an inter-state distance representing a similarity of values between state amounts of the system state calculated by the system state candidate calculation unit, and a variability evaluation value calculation unit for calculating a variability evaluation value in which a variability of the system state is evaluated, based on an objective function value calculated from the state amount of the system state calculated by the system state candidate calculation unit and the inter-state distance calculated by the inter-state distance calculation unit. The system state is selected based on the calculated variability evaluation value.Type: GrantFiled: August 18, 2014Date of Patent: December 12, 2017Assignee: Hitachi, Ltd.Inventors: Jun Yamazaki, Yasuo Sato, Toshiyuki Sawa, Taichiro Kawahara
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Patent number: 9711976Abstract: This invention reduces degradation of respective lead storage batteries making up a lead storage battery bank and extends the longevity of the lead storage batteries. A lead storage battery system includes an individual battery state measurement unit 102 that measures current, voltage, temperature etc.Type: GrantFiled: October 1, 2012Date of Patent: July 18, 2017Assignee: HITACHI CHEMICAL COMPANY, LTD.Inventors: Keiko Abe, Hideki Inoue, Toshiyuki Sawa, Masahiro Watanabe, Hisaaki Takabayashi, Ichiro Shimoura, Keisuke Fukuhara
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Publication number: 20150084432Abstract: A power system management device which manages a system state in a power system includes a system state candidate calculation unit for calculating state amounts of the system state based on an objective function from system characteristic information indicating characteristic information of a system structure, an inter-state distance calculation unit for calculating an inter-state distance representing a similarity of values between state amounts of the system state calculated by the system state candidate calculation unit, and a variability evaluation value calculation unit for calculating a variability evaluation value in which a variability of the system state is evaluated, based on an objective function value calculated from the state amount of the system state calculated by the system state candidate calculation unit and the inter-state distance calculated by the inter-state distance calculation unit. The system state is selected based on the calculated variability evaluation value.Type: ApplicationFiled: August 18, 2014Publication date: March 26, 2015Inventors: Jun YAMAZAKI, Yasuo SATO, Toshiyuki SAWA, Taichiro KAWAHARA
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Patent number: 8831790Abstract: A battery control apparatus of this invention is provided which comprises: a battery installed on a feeder of a utility distribution system; batteries installed between pole-mounted transformers and branch points of the distribution lines; a communication network to transmit measurement data measured by meters; a battery control quantity calculation unit to determine battery control quantities from the measurement data acquired from the communication network; a load data collection unit to collect load data representing a combination of power consumption by a plurality of loads and generated power of distributed power generations; a frequency conversion unit to perform a frequency analysis on the load data; an intermediate-cycle component extraction unit to extract intermediate-cycle components; a battery control quantity calculation unit to determine battery control quantities from the extracted intermediate-cycle components; and a battery control command transmission unit to transmit the calculated controlType: GrantFiled: June 29, 2011Date of Patent: September 9, 2014Assignee: Hitachi, Ltd.Inventors: Yasutaka Kimura, Masahiro Watanabe, Toshiyuki Sawa
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Publication number: 20140239900Abstract: This invention reduces degradation of respective lead storage batteries making up a lead storage battery bank and extends the longevity of the lead storage batteries. A lead storage battery system includes an individual battery state measurement unit 102 that measures current, voltage, temperature etc.Type: ApplicationFiled: October 1, 2012Publication date: August 28, 2014Inventors: Keiko Abe, Hideki Inoue, Toshiyuki Sawa, Masahiro Watanabe, Hisaaki Takabayashi, Ichiro Shimoura, Keisuke Fukuhara
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Publication number: 20140222228Abstract: A plurality of forecast weather groups in a period comprising a plurality of days including a forecast target day for forecasting the electric power demand, and a plurality of actual weather groups in a period in a plurality of days in the past are set as the target period, and the similarity between the forecast weather group and the plurality of actual weather groups is calculated, a trend of a subsequent electric power demand is predicted based on the comparison of the plurality of calculated similarities whereby the electric power demand of a forecast target day is known.Type: ApplicationFiled: August 14, 2012Publication date: August 7, 2014Applicant: Hitachi, Ltd.Inventors: Toshiyuki Sawa, Shigeki Mori, Jun Yamazaki
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Publication number: 20120004787Abstract: A battery control apparatus of this invention is provided which comprises: a battery installed on a feeder of a utility distribution system; batteries installed between pole-mounted transformers and branch points of the distribution lines; a communication network to transmit measurement data measured by meters; a battery control quantity calculation unit to determine battery control quantities from the measurement data acquired from the communication network; a load data collection unit to collect load data representing a combination of power consumption by a plurality of loads and generated power of distributed power generations; a frequency conversion unit to perform a frequency analysis on the load data; an intermediate-cycle component extraction unit to extract intermediate-cycle components; a battery control quantity calculation unit to determine battery control quantities from the extracted intermediate-cycle components; and a battery control command transmission unit to transmit the calculated controlType: ApplicationFiled: June 29, 2011Publication date: January 5, 2012Inventors: Yasutaka Kimura, Masahiro Watanabe, Toshiyuki Sawa
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Publication number: 20040181491Abstract: A method, equipment and a program that present uncertain factors such as the demand variation of electric power, electric power unit price and fuel unit price in stochastic models, provide the analytical means of the correlation between return and risk by which the results can be quantitatively given, have GUI means to do trail and error evaluation of the combinations of various conditions regarding to the interrupt operation plan and electric power trade contract plan and have an amendment means by which the amendment of plans is cooperated with the analytical means of the correlation between return and the risk has been proposed. The system enables to comprehend the correlation between returns and risk that the present operating schedule involves.Type: ApplicationFiled: October 30, 2003Publication date: September 16, 2004Applicant: HITACHI, LTD.Inventors: Yasuo Sato, Yasushi Harada, Toshiyuki Sawa, Mitsuo Tsurugai, Shigeru Tamura
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Patent number: 6571152Abstract: One of a plurality of switches constituting a power system is set as a perceived switch, and n optional switches Bk (k=1 to n) in the on state among the other switches are changed to the off state, and n loop networks including the perceived switch are created, and each switch Ck (k=1 to n) constituting the loop networks is changed from the off state to the on state so as to create a plurality of network configuration candidates, and a power network configuration is decided on the basis of the plurality of network configuration candidates.Type: GrantFiled: November 15, 2000Date of Patent: May 27, 2003Assignee: Hitachi, Ltd.Inventors: Toshiyuki Sawa, Toshiyuki Furukawa, Tsukasa Onishi
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Patent number: 6181984Abstract: One of a plurality of switches constituting a power system is set as a perceived switch, and n optional switches Bk (k=1 to n) in the on state among the other switches are changed to the off state, and n loop networks including the perceived switch are created, and each switch Ck (k=1 to n) constituting the loop networks is changed from the off state to the on state so as to create a plurality of network configuration candidates, and a power network configuration is decided on the basis of the plurality of network configuration candidates.Type: GrantFiled: February 20, 1998Date of Patent: January 30, 2001Assignee: Hitachi, Ltd.Inventors: Toshiyuki Sawa, Toshiyuki Furukawa, Tsukasa Onishi
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Patent number: 5122991Abstract: A distance measuring apparatus and method using an acoustic signal. It includes a transmitting probe for transmitting an acoustic signal from a transmitter, a plurality of receiving probes having resonance frequencies different from the central frequency of the signal transmitted from the transmitting probe, and a control circuit for controlling the functions of those probes. The acoustic signal is received by a receiving probe having a resonance frequency which provides the maximum received-signal sensitivity at the central frequency of the received acoustic signal under the control of the control circuit to thereby measure a long distance accurately.Type: GrantFiled: July 12, 1990Date of Patent: June 16, 1992Assignee: Hitachi, Ltd.Inventors: Masahiro Koike, Sigeru Kajiyama, Toshiyuki Furukawa, Kazuo Takaku, Toshiyuki Sawa